The Galinsoga Ruiz & Pavón genus
The words or terms in red
(actually dark orange) in the text are defined in a
The Galinsoga are
annual plants with erect stems;
their leaves are
blades being 3 nerved.
The small flower heads are
hemispherical to campanulate
and in loose terminal cymes.
They essentially have
disc florets and few sparse
white ray florets, at times, none.
The fruit is an achene.
There are about 30 species in the
genus, of which two are found in North
America, where it is an introduced
one of the two species has 3 varieties;
of these 4 taxa, two are found in Québec :
The main differences between these two taxa are that the
phyllaries of Galinsoga parviflora
are persistent, those of Galinsoga quadriradiata are falling.
At the cell level, Galinsoga parviflora is a
diploid (2n = 16) and
Galinsoga ciliata is a segmental
allotetraploid (2n = 32).
The genus belongs to the
The genus has been named after Mariano Martínez de Galinsoga, 1766-1797,
who was court physician and director of the Botanic Garden in Madrid.
The vernacular names for the species found in Québec are Few Flowered
Galinsoga for the parviflora species and Four Pointed
Galinsoga or Shaggy Soldier for the quadriradiata species.